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Question
What is Newlands' law of octaves? Explain with an example.
Solution
According to Newlands' law of octaves, when elements are arranged in increasing order of their atomic masses, the properties of the eighth element are a repetition of the properties of the first element. Newlands divided the elements into horizontal rows. Each horizontal row had 7 elements.
For example, let us take a row from Newlands' classification of elements. If we take the elements Li, Be, B, C, N,O, F and Na, lithium (Li) is the first element, and sodium the eighth. It has been found that the properties of sodium are a repetition of the properties of lithium. In short, both lithium and sodium have similar chemical properties.
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RELATED QUESTIONS
What were the limitations of Newlands’ Law of Octaves?
The Newland's law of octaves for the classification of elements was not found to be applicable only up to the element:
(a) potassium
(b) calcium
(c) cobalt
(d) phosphorus
A part of the early classification of elements has been given below:
| H | Li | Be | B | C | N | O |
| F | Na | Mg | Al | Si | P | S |
(a) Which law of classification of element is illustrated by the above arrangement of elements?
(b) Name the scientist who proposed such a classification of elements.
(c) Why is such a classification of elements compared with a characteristics of musical scale?
(d) State one limitation of this classification of elements.
Explain 'Newland's Law of Octaves.' Why was the law discarded?
What was the basis of the classification proposed by Newland?
To which element does Newland’s octave rule apply?
The elements beryllium, magnesium and calcium are in group 2. What will be their valency?
The similarity between the properties of the first and eighth elements is called the octave rule.
State Newland’s Law of Octaves.
Upto which element, the Law of Octaves was found to be applicable
